I have some dialogue that is clean and it's easy to understand what the people are saying but I was wondering if there is a way to create this dialogue into walla so it's unrecognizable. Thank you.
Ideally you just want to record a crowd. That way all the voices blend in an ambience. However, with a combination of EQ (bright frequencies are important for intelligibility, cut those), ambience/reverb (very important to make the different pieces blend together), layering several pieces of dialogue over each other, and possibly using other plugins that can double, pitch-shift, formant shift, or whatnot to make an individual piece of dialogue sound like multiple people...make sure to pan your different layers a bit too so they sound like multiple sources.
Overall, definitely more time-consuming than recording the sound you need or using a library sound. And the result will likely be worse. If you're doing this as an exercise, have fun with it for sure.